Air quality in Larkspur
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
PM2.5
11.9 µg/m³
WHO guideline 15
PM10
12.1 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 PM
💨
PM2.5 11.9 µg/m³
50Good
8:00 PM
💨
PM2.5 11.6 µg/m³
48Good
9:00 PM
💨
PM2.5 10.9 µg/m³
45Good
10:00 PM
💨
PM2.5 8 µg/m³
33Good
11:00 PM
💨
PM2.5 4.4 µg/m³
18Good
12:00 AM
💨
PM2.5 2.5 µg/m³
17Good
1:00 AM
💨
PM2.5 2 µg/m³
17Good
2:00 AM
💨
PM2.5 2 µg/m³
17Good
3:00 AM
💨
PM2.5 2.1 µg/m³
17Good
4:00 AM
💨
PM2.5 2 µg/m³
17Good
5:00 AM
💨
PM2.5 1.8 µg/m³
17Good
6:00 AM
💨
PM2.5 1.6 µg/m³
17Good
Next few days
daily max · US EPA AQI
Sun
💨
Good · UV Moderate
50
Mon
💨
Good · UV Moderate
39
Tue
💨
Good · UV Moderate
37
Wed
💨
Moderate · UV Moderate
70
Thu
💨
Moderate · UV Moderate
70